package cn.itcast.controller;

import cn.itcast.common.R;
import cn.itcast.entity.Employee;
import cn.itcast.service.EmployeeService;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){

        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3、如果没有查询到则返回登录失败结果
        if(emp == null){
            return R.error("输入的用户名不存在");
        }

        //4、密码比对，如果不一致则返回登录失败结果
        if(!emp.getPassword().equals(password)){
            return R.error("输入的密码错误或者用户名错误");
        }

        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if(emp.getStatus() == 0){
            return R.error("账号已禁用");
        }

        //6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     *增加员工
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes(StandardCharsets.UTF_8)));
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        Long Id = (Long) request.getSession().getAttribute("employee");
//        employee.setCreateUser(Id);
//        employee.setUpdateUser(Id);
        employeeService.save(employee);
        return R.success("增加成功");
    }
    /**
     * 分页查询员工
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //创建分页器
        Page page1 = new Page(page, pageSize);
        //创建条件构造器
        LambdaQueryWrapper<Employee> employeeLambdaQueryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        employeeLambdaQueryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        employeeLambdaQueryWrapper.orderByDesc(Employee::getUpdateTime);
        //查询
        employeeService.page(page1,employeeLambdaQueryWrapper);
        return R.success(page1);
    }

    /**
     * 根据id修改员工
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
//        Long empId = (Long)request.getSession().getAttribute("employee");

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        employeeService.updateById(employee);

        return R.success("员工信息修改成功");
    }


    /**
     * 编辑
     * 根据id查询员工
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable long id){
        Employee employee = employeeService.getById(id);

        if (employee != null){
            return R.success(employee);
        }else {
            return R.error("没有查询到该员工信息");
        }

    }

}